A cappella superstars Pentatonix are used to delighting us with their incredible singing voices for quite a bit, and every time they make an appearance it is a joy to behold.

So of course their appearance on Jimmy Kimmel Live singing "God Rest Ye Merry Gentlemen" is going to get a write-up here! Are you kidding me? Listen to their incredible melodious voices! Do you feel that salty water hitting your cheek? Do you? Those are tears baby! Tears!

Pentatonix was on to promote their new album, A Pentatonix Christmas, so you too can feel uplifted by the holiday spirit. But where's my favorite Christmas song!?!? Wham's "Last Christmas"!? You know, the song that makes everyone sad!? Please Pentatonix, it is time to be sad!

What do you think of the song? Let us know in the comments or on Twitter at @WhatsTrending where we're always ready to talk about a cappella at a moment's notice!